A preliminary report on ending the Legionnaires’ disease crisis at the Quincy veteran’s home recommends building a state-of-the-art facility and other improvements costing up to $278 million.

A new residential building would cost up to $250 million. The report recommends campus-wide plumbing replacement for about $16 million, drilling a well and buying a nearby nursing home for about $12 million.

A final report is due in May.